// Copyright 2021-present StarRocks, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.starrocks.qe;

/**
 * A trivial implementation of {@link BackendSelector}.
 * <p> Some ScanNodes without any scan range, such as SchemaScanNode, will use this BackendSelector.
 */
public class NoopBackendSelector implements BackendSelector {
    @Override
    public void computeScanRangeAssignment() {
        // Do nothing.
    }
}
